Complete the reaction equations: 1) MgO +? → MgCl2 +? 2) SO2 + KOH →? +? 3) CO2 + Ba (OH) 2

Complete the reaction equations: 1) MgO +? → MgCl2 +? 2) SO2 + KOH →? +? 3) CO2 + Ba (OH) 2 →? +? 4) SiO2 + NaOH →? +? 5) SO3 + NaOH →? +? 6) CaO + SiO2 →? +? 7) Na2O + SiO2 →? 8) CaO + CO2 →? С 4 equations, 7 each above the arrow – degree sign (t)

1) Magnesium oxide enters into a chemical reaction with hydrochloric acid. As a result of the reaction, a substance is formed: a salt of magnesium chloride and water is released.

MgO + 2 HCl = MgCl₂ + H₂O

2) The reaction takes place between substances such as tetravalent sulfur oxide and potassium hydroxide. As a result of the reaction, substances are formed: potassium sulfate salt and water.

SO₂ + 2 KOH = K₂SO₃ + H₂O

3) Carbon dioxide and barium hydroxide, after passing through a chemical reaction, form a salt of barium carbonate and water.

CO₂ + Ba (OH) ₂ = BaCO₃ + H₂O

4) The reaction takes place between substances such as silicon oxide and sodium hydroxide. We get sodium metasilicate and water.

SiO₂ + 2 NaOH = Na₂SiO₃ + H₂O

5) Hexavalent sulfur oxide and sodium hydroxide. As a result of the reaction, substances are formed: sodium sulfate salt and water.

SO₃ + 2 NaOH = Na₂SO₄ + H₂O

6) The reaction takes place between substances such as calcium oxide and silicon oxide. Since one oxide is basic and the other is an amphoteric reaction, a calcium silicate salt is formed.

CaO + SiO₂ = CaSiO₃

7) Sodium oxide and silicon oxide form sodium metasilicate.

Na₂O + SiO₂ = Na₂SiO₃

8) Obtaining calcium carbonate from calcium oxide and carbon dioxide.

CaO + CO₂ = CaCO₃.